Upgrade vShield App to NSX Firewall

Unfortunately I am having issues in my lab, so I was unable to perform the upgrade of the virtual wires to logical switches, which is a prerequisite to upgrade the Firewall. I was getting the following error, and I am currently investigating to see what might be causing it. If anyone has any feedback or resolves this issue please let me know. Luckily, the steps to upgrade the NSX firewall are fairly simple, so I will go through the steps at the bottom.